Impeller for vibrators



July 2, 1929. B, A MITCHELL y 1.719.122

IMPELLER FOR VIBRATORS Filed March 2, 1928 Patented July 2, 1929.

UNITED STATES BENJAMIN A. MITCHELL, OF TOMPKINSVILLE, NEW YORK.

IMPELLER FOR VlBRATORS.

Application filed March 2, 1928.

This invention relates to vibrators of the general character of thatshown in Letters Patent of the United States, No. 1,459,841, dated lune2G, 1923, granted to the present applicant, in which a freely movablebody, such as a ball, is caused by a rotating impel ler to revolve aboutthe axis of the impeller and within a race-way Carried by the memberwhich is to be vibrated or gyrated. lhe vibra'ors shown in Said LettersPatent comprise a generally cylindrical housing which is Supported atits middle portion so ae to be capable of gyratory vibration about itecen ter. TWithin the housing is a motor which drives an impeller Shaftsupported in suitable bearings in the housing and carrying at each endanimpeller which drives a freely movable, eccentric body, such as a ballor roller, subject to centrifugal action, for coaction with a race-waysecured :in the housing. ln that con struction the freely movable bodyis placed in a recess; .in the impeller. The present improven'ient isconcerned particularly with the means by which such freely movable bodyis Carried by and revolved with the impeller in :ite` rotation about itsown. axis. In accordance with the invention the ball or movable body isreceived within a guide sleeve which is itself swiveled upon an axis atright angles to the axis of the impeller shaft. The guide sleeve issupported so as to have limited free dom of movement in the direction oflength of the impeller Lehaft andthe freely movable body `guided therebyand eoaeting with the race-way therefore free to aceommodate itself tothe race-way. The wear on the impeller, which is a l'iiaterial factor atthe high speed, S-:ay 350() ll. l). lill., at which the vibra tor iedesigned to operate, is thue reduced. The invention will be explainedmore fully hereinafter with reference to the accolnpanyingdrawing inwhich it is illustrated and in which:

Figure l is a view in longitudinal sectional ele ration of a vibratorwhich embodies the invention.

Figure 2 is a view of the same in end elevation as seen from the righthand in Figure l, with the end cap removed.

ln the embodiment of the invention :illustrated, a generally cylindricalhousing;` 5() is supported at its middle portion so as to be capablo ofvibratory gyration about its center, being, in this case, the member towhich the vibratory or gyratory movement is imparted.

`Ceive the ball. lo This specification signed this 28th day of SerialNo. 258,536.

lt receives a motor 5l by which rapid rotation is imparted to theimpeller shaft V52, supported in suitable bearings 53 in the houeinfr50. also mounted in the housing' 50, at eaeh end thereof, 'is a race-way54C for coaetiou,.under the influence of centrifugal action, with afreely movable ball or intermediate, member 55. Also mounted on theimpeller shaft 52, at each end thereof, so as to rotate therewith, animpeller, which, in the construction lahown, comprises a tubular Shell56, which is keyed on the shaft 52, and a guide sleeve 5T which isewiveled, as at 553,011 an axia at Aright angles with the axieI of theshaft 52. 'lhe `ruido sleeve 57 receives with a free working lit the intJrn'iediate, freely movable ball 55 and has a somewhat loose lit withinthe tubular casing 5G so that it has limited freedom of n'iovement in alongitudinal. direction with respect to the impeller shaft. The hall 55,wh ile thus; driven by the inuvieller, is free to aecommodate itself tothe race-way.

lt will he understood that the tubular casing` 56 is diametrieallyarranged with respect to the impeller shaft and is extended equally onboth sides and that it carries at eaeh side a guide sleeve 5T so th atthe impeller is perfectly balanced the vibratory gyration of thevibrated member.' 52 being eilerted by the freely movable ball 55 underthe intluenre of reutrifupgal action.

l claim as my invention 1;- ln a vibrator, the eou'lbination of arotatable shaft, a member to be vibrated and having); an internalrace-way, a freely movable ball to coaet with the race-way and fuibjectto centrifugalaction, and an impeller secured to the shaft and havingI aggu'if'le sleeve for the bul l swiveled on an axis at right angles tothe axie of the eh aft. i i

2. In a vibrator, the combination of a rotatable shaft, a member to bevihrated and having an internal race-way, a freely movable ball to coactwith the race-way and subject to centrifugal action, and an impellersecured 'o the shaft to rotate therewith and cmnprising` a tubularcasing,l secured to the Shaft, and a guide sleeve swiveled in saidcasingI on an axis at right angles to the axis of the shaft to re-February, A. D. 1928.

BENJAMIN A. MITCHELL.

